Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D83/00—Containers or packages with special means for dispensing contents
  • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
  • B65D83/44—Valves specially adapted therefor; Regulating devices
  • B65D83/52—Valves specially adapted therefor; Regulating devices for metering
  • B65D83/525—Valves specially adapted therefor; Regulating devices for metering with means for adjusting the metered quantity
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M11/00—Sprayers or atomisers specially adapted for therapeutic purposes
  • A61M11/006—Sprayers or atomisers specially adapted for therapeutic purposes operated by applying mechanical pressure to the liquid to be sprayed or atomised
  • A61M11/007—Syringe-type or piston-type sprayers or atomisers

Definitions

• the present invention relates in general to a pressurized, unit dose liquid dispenser, and it relates in particular to a new and improved pressurized liquid dispenser which emits an adjustable, premeasured dose of liquid each time the dispenser is actuated.
• insulin can be advantageously administered in the form of a spray applied to the nasal tissues of the patient. Since the prescribed doses of insulin vary over a relatively wide range, it is not possible to use any single unit dispenser for all patients unless each actuation of the dispenser emits only a very small quantity of insulin constituting a small percentage of a prescribed dose, thereby necessitating repeated operation of the dispenser for each prescribed dose of insulin. This multiple operation of the dispenser for each dose requires that the patient accurately count the 9- number of times the dispenser is actuated to insure that the prescribed dose is administered. This procedure is not only unnecessarily time consuming, but it can result in the improper administration of medication to the patient.
• a dispenser which emits an adjustable, but precise, dose of insulin or other liquid upon each actuation of the dispenser.
• the adjustment should be made without the use of special tools or the like so as to permit the physician as well as the patient to easily adjust the dose to be dispensed upon each actuation of the dispenser.
• a novel liquid dispenser which emits an adjustable dose of liquid upon each actuation of the dispenser.
• the dispenser includes a reservoir containing a pressurized supply of the liquid to be dispensed, a metering chamber having an adjustable volume which is automatically filled with the liquid from the reservoir while the dispenser is in the inoperative condition, and a dispensing orifice which communicates with the metering chamber when a metering and dispensing valve is actuated to dispense the contents of the metering chamber to the patient.
• a plurality of metering chambers of different volumetric capacity are •6 provided, and these chambers are adapted to be selectively moved from an inoperative to an operative position so that only the amount of liquid in the selected metering chamber is dispensed when the valve is actuated.
• the metering chambers are mounted on the stem of the metering and dispensing valve and are arranged about the periphery of the valve stem so as to be selectively brought into the operative position opposite an elastomeric discharge member interposed between the reservoir and the selected metering chamber by rotation of the valve stem.
• the valve stem is accessible from the outside of the dispenser so as to facilitate adjustable rotation thereof.
• Fig. 1 is a fragmentary, elevational view, partly n cross-section, showing the metering and dispensing valve of a unit dose dispenser embodying the present invention, the dispenser being shown in the inoperative fill position;
• Fig. 2 is a fragmentary, elevational view, partly in cross-section, of the dispenser of Fig. 1, the dispenser being shown in the operative dispensing position;
• Fig. 3 is an isometric view of an element of the dispensing valve of the dispenser of Fig. 1;
• Fig. 4 is an isometric view of a resilient dispensing member used in the dispenser of Fig. 1;
• Fig. 5 is an isometric view of the stem and metering chambers used in the dispenser of Fig. 1;
• Fig. 6 is a fragmentary elevational view of the nozzle and actuator member, and the upper portion of the container of the dispenser shown in Fig. 1;
• Fig. 7 is a fragmentary elevational view, partly in cross-section of another embodiment of the present invention which provides an infinitely adjustable unit dose dispenser;
• Fig. 8 is an isometric view of one element of the dispenser shown in Fig. 7;
• Fig. 9 is a cross-sectional view taken along the line 9-9 of Fig. 8;
• Fig. 10 is a cross-sectional view taken along the line 10-10 of Fig. 8.
• a unit dose liquid spray dispenser 10 may be seen to include as its principal elements a rigid outer shell 12 formed of a suitable protective material such as metal, glass or plastic, an elastomeric reservoir 14 disposed entirely within the shell 12, a combined dispensing nozzle and a dispenser actuator 16, and a dispensing valve assembly identified generally by the reference number 18.
• a liquid to be dispensed in prescribed doses fills the chamber within the reservoir 14 and is maintained under pressure by an elastomeric sleeve 20 which had been stretched during the supply of the liquid under pressure to a closed flexible plastic container 22 positioned within the sleeve 20.
• pressurized reservoir of this general type is described in U.S. patent 4,387,833. It will be understood by those skilled in the art, however, that other types of pressurized reservoirs, such as the aerosol type, may be used for some applications in place of a pressurized elastomeric reservoir.
• the dispensing valve assembly 18 includes a generally tubular flexible member 24 having an annular mounting and sealing flange 26 at the top and a centrally disposed generally conical portion 28 which depends into the reservoir.
• a generally tubular, rigid member 30 having an annular, external flange 32 at the top and a central conical portion 34 which fits tightly within the conical portion 28 of the member 24.
• a trapezoidal shaped window 36 is provided in the conical portion 34 of the member 30 near the bottom thereof and as shown in Figs. 1 and 2 is covered by the flexible member 24.
• the parts 12, 14, 20, 24 and 30 are held together in mutually assembled relationship by means of a metallic locking cap 37 which fits over external flanges on the respective parts as shown in Figs. 1 and 2.
• An annular rxange ⁇ at tne top of the container member 1 is sealingly compressed between an annular flange 40 at the top of the elastomeric sleeve 20 and the annular flange 26 at the top of the member 24.
• a tubular valve stem 42 extends upwardly through a central opening 44 in the cap 37 into a bore 46 in the nozzle and actuator member 16.
• the cap 37 is provided with an inverted cup-like central section 48 in which a pair of sealing washers 50 and 52 are positioned in superimposed relationship in sealing engagement with the external surface of the valve stem 42.
• An external annular ridge 54 is provided on the valve stem 42 and provides a stop surface which abuts the bottom surface of the lower sealing washer 52 to prevent spurious withdrawal of the valve stem from the dispenser.
• An orifice 56 is provided in the wall of the valve stem 42 at a location so as to be sealably closed by the upper sealing washer 50 when the dispenser is in the inoperative position shown in Fig. 1. As is described in greater detail hereinafter, when the valve stem is depressed to dispense a dose of liquid through the nozzle, the liquid dose is conducted through the orifice 56 to the nozzle.
• a frustoconical metering chamber carrying member 60 is fixedly mounted on the valve stem 42 below the ridge 54 in coaxial relationship therewith.
• the external profile of the member 60 is complementary to the portion of the member 30 containing the window 36 and is provided with a plurality of parabolic recesses 62a, 62b, and 62c which open onto the top surface 64 of the member 60.
• the recesses are of different sizes and provide metering chambers of a plurality of different sizes. In the disclosed embodiment, there are four such recesses, only three of which are visible in the drawing.
• the pressure in the reservoir forces the portion of the member 24 disposed opposite the window through the window against the surface of the respective recess to expel the volume of the recess through the stem and the orifice 56 to the dispensing nozzle. It will thus be seen that the volume of the recess disposed opposite the window 36 determines the quantity of liquid which is dispensed each time the nozzle and actuator 16 is depressed.
• a rod 68 depends from the member 60 in coaxial relationship with the valve stem 42, and a resilient valve member 70 is mounted to the bottom end thereof.
• the lower end of the member 30 is inturned to provide a lip 72 which functions as an annular valve seat 72 against which the valve member 70 is compressed when the nozzle and actuator member 16 is fully depressed.
• a coil spring 74 surrounds the rod 68 and is held in compression between the lip 72 and the bottom of the member 60 to bias the valve to the inoperative position.
• the valve When the valve is in the inoperative position shown in Fig. 1, the chamber within the member 30 is in direct communication with the reservoir chamber, and liquid is thus transferred thereto filling all of the metering recesses as well as the remainder of the chamber.
• the valve member 70 When the nozzle and actuator member 16 is subsequently depressed to the position shown in Fig. 2, the valve member 70 is sealably seated against the seat 72 to seal the metering chambers from the reservoir.
• the orifice 56 in the valve stem is located below the sealing washers 50 and 52 so as to communicate the metering chambers to the nozzle.
• the pressure in the reservoir forces the flexible member into the particular recess positioned opposite the window 36 to force from the inner chamber in the member 30 an amount of liquid equal to the volume of the particular recess positioned opposite the window 36.
• a detent may be provided between the flange 76 and the cap 37 or in any other suitable location to hold the member 60 in the selected angular position.
• FIGs. 7 and 8 there is illustrated another embodiment of the invention in the form of a dispenser 100 wherein the volume of liquid which is dispensed upon each actuation of the dispenser is infinitely adjustable.
• Most of the parts of the dispenser 100 are identical to corresponding parts in the dispenser 10 shown in Figs. 1 and 2, and therefore, similar parts are identified by like reference numbers.
• a chamber volume adjusting member 102 is mounted to the valve stem 42 above the spring 74 and has an eccentric external surface 104 having a configuration which may be best understood by reference to Figs. 9 and 10. It may be seen that as the stem 42 is rotated the space between the peripheral surface of the member 102 and the window 36 in the member 30 is varied so that when the member 24 is pressed through the window 36 into engagement with the /0 surface 102 the volume of liquid which is dispensed is also varied.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Health & Medical Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• Public Health (AREA)
• Anesthesiology (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Hematology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical & Material Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Dispersion Chemistry (AREA)
• Veterinary Medicine (AREA)
• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
• Valve Device For Special Equipments (AREA)
• Vehicle Body Suspensions (AREA)
• Confectionery (AREA)
• Medicinal Preparation (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
• External Artificial Organs (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)

Applications Claiming Priority (3)

Publications (3)

Family

ID=24437598

Family Applications (1)

Country Status (13)

Families Citing this family (36)

Citations (1)

Family Cites Families (9)

• 1990
  • 1990-11-05 US US07/608,690 patent/US5085351A/en not_active Expired - Lifetime
• 1991
  • 1991-10-22 DE DE69126536T patent/DE69126536T2/de not_active Expired - Fee Related
  • 1991-10-22 EP EP92900282A patent/EP0555379B1/de not_active Expired - Lifetime
  • 1991-10-22 BR BR919106822A patent/BR9106822A/pt not_active IP Right Cessation
  • 1991-10-22 WO PCT/US1991/007821 patent/WO1992007777A1/en active IP Right Grant
  • 1991-10-22 AT AT92900282T patent/ATE154322T1/de not_active IP Right Cessation
  • 1991-10-22 CA CA002088762A patent/CA2088762A1/en not_active Abandoned
  • 1991-10-22 AU AU89425/91A patent/AU650305B2/en not_active Ceased
  • 1991-10-22 JP JP4500782A patent/JPH06501440A/ja active Pending
  • 1991-11-01 IL IL99931A patent/IL99931A0/xx not_active IP Right Cessation
  • 1991-11-04 MX MX9101903A patent/MX9101903A/es not_active IP Right Cessation
  • 1991-11-04 IE IE384591A patent/IE913845A1/en not_active Application Discontinuation
  • 1991-11-05 CN CN91111443.2A patent/CN1025488C/zh not_active Expired - Fee Related

Patent Citations (1)

Also Published As

Similar Documents

Legal Events